/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/ISpatialAcceleration.h
template<typename T, int d> class TGeometryParticle
FDirtyChaosProp...
MDirtyFlags
IPhysicsProxyBa...
Proxy
Pointer to any data that the solver wants to associate with this particle TODO: It's important to eventually hide this! Right now it's exposed to lubricate the creation of the whole proxy system.
EParticleType
Type